/**
 * Copyright (C) 2006-2010 The Parancoe Team <info@parancoe.org>
 *
 * This file is part of Parancoe Core.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package ch.qos.logback.core;

import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.read.InspectableCyclicBufferAppender;

/**
 * LogBack in-memory log appender
 *
 * @author michele franzin <michele at franzin.net>
 */
public class MemoryAppender extends InspectableCyclicBufferAppender<ILoggingEvent> {

    private static MemoryAppender instance;

    public MemoryAppender() {
        instance = this;
    }

    public static MemoryAppender getInstance() {
        if (instance == null) {
            throw new NullPointerException(
                    "memory appender not initialized. Please provide a valid logback.xml");
        }
        return instance;
    }
}
